Do a search and you will find a few threads. I have not installed mine yet (Nor purchased one) but I did buy this wiring tap for the mirror. I read about this on Facebook and other GV80 forums. Several people have used this on their GV80's. This makes wiring your dash cam a 5 minutes process.
Let us know how you make out and which camera you buy.

Amazon.com: Dongar Technologies Dash Cam Power Adapter 10-pin Type H for Select Kia/Hyundai : Automotive
Amazon.com: Dongar Technologies Dash Cam Power Adapter 10-pin Type H for Select Kia/Hyundai : Automotive
www.amazon.com